#app2 {
}

#app2 .tab-bar {
    display: flex;
}

#app2 .tab-bar > li {
    border: 1px solid black;
    width: 50%;
}

#app2 .tab-bar > li.selected {
    background: palegreen;
    color: white;
}

#app2 .tab-content > li {
    display: none;
}

#app2 .tab-content > li.active {
    display: block;
}